62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/* int.c --- M32C interrupt handling.
|
|
|
|
Copyright (C) 2005 Free Software Foundation, Inc.
|
|
Contributed by Red Hat, Inc.
|
|
|
|
This file is part of the GNU simulators.
|
|
|
|
The GNU simulators are free software; you can redistribute them and/or
|
|
modify them under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU simulators are distributed in the hope that they will be
|
|
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with the GNU simulators; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301, USA */
|
|
|
|
|
|
#include "int.h"
|
|
#include "cpu.h"
|
|
#include "mem.h"
|
|
|
|
void
|
|
trigger_fixed_interrupt (int addr)
|
|
{
|
|
int s = get_reg (sp);
|
|
int f = get_reg (flags);
|
|
int p = get_reg (pc);
|
|
|
|
if (A16)
|
|
{
|
|
s -= 4;
|
|
put_reg (sp, s);
|
|
mem_put_hi (s, p);
|
|
mem_put_qi (s + 2, f);
|
|
mem_put_qi (s + 3, ((f >> 4) & 0x0f) | (p >> 16));
|
|
}
|
|
else
|
|
{
|
|
s -= 6;
|
|
put_reg (sp, s);
|
|
mem_put_si (s, p);
|
|
mem_put_hi (s + 4, f);
|
|
}
|
|
put_reg (pc, mem_get_psi (addr));
|
|
set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0);
|
|
}
|
|
|
|
void
|
|
trigger_based_interrupt (int vector)
|
|
{
|
|
int addr = get_reg (intb) + vector * 4;
|
|
if (vector <= 31)
|
|
set_flags (FLAGBIT_U, 0);
|
|
trigger_fixed_interrupt (addr);
|
|
}
|